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pong.js
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pong.js
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var WIDTH=700, HEIGHT=600, pi=Math.PI;
var canvas, ctx, keystate;
var player, ai, ball;
player = {
x: null,
y: null,
width: 20,
height: 100,
update: function() {},
draw: function() {
ctx.fillRect(this.x, this.y, this.width, this.height);
};
ai = {
x: null,
y: null,
width: 20,
height: 100,
update: function() {},
draw: function() {
ctx.fillRect(this.x, this.y, this.width, this.height);
};
ball = {
x: null,
y: null,
side: 20,
update: function() {},
draw: function() {
ctx.fillRect(this.x, this.y, this.side, this.side);
};
function main() {
canvas = document.createElement("canvas");
canvas.width = WIDTH;
canvas.height = HEIGHT;
ctx = canvas.getContext("2d");
document.body.appendChild(canvas);
init();
function loop() {
update();
draw();
window.requestAnimationFrame(loop, canvas);
}
}
window.requestAnimationFrame(loop, canvas);
function init() {
player.x = player.width;
player.y = (HEIGHT - player.height)/2;
ai.x = WIDTH -
}
function update() {}
function draw() {}